Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Family Heptageniidae - Flatheaded Mayflies

Phylum Arthropoda - Arthropods
Subphylum Hexapoda - Hexapods
Class Insecta - Insects
Order Ephemeroptera - Mayflies
Suborder Pisciforma
Superfamily Heptagenioidea
Family Heptageniidae - Flatheaded Mayflies

Genus Cinygma
Genus Cinygmula
Genus Ecdyonurus
Genus Epeorus
Genus Heptagenia
Genus Ironodes
Genus Leucrocuta
Genus Maccaffertium
Genus Nixe
Genus Raptoheptagenia
Genus Rhithrogena
Genus Spinadis
Genus Stenacron
Genus Stenonema